Ta yaya ake ƙididdige abin da ake buƙata na 'Groove Depth' don zoben riƙe da karkace bisa 'Radius at the Bottom of the Groove'?

Zurfin rami $d$ dole ne ya isa ya zaunar da zoben amintacce yayin lissafin radius na kusurwa ($r$) na ɓangaren da aka riƙe. Idan ɓangaren da ke riƙe yana da babban radius, zai tuntuɓi zoben ya ƙara fita, yana ƙirƙirar 'hannun lever' wanda zai iya karkatar da zoben daga cikin tsagi (sakamakon 'tasa'). Ingantacciyar zurfin tsagi $d_{eff} = d - (r imes 0.707)$ ana yawan amfani dashi azaman kiyasin mazan jiya. Matsakaicin zurfin tsagi shine yawanci 1/3 na faɗin bangon radial na zobe. Don aikace-aikacen ɗorewa, zurfin tsagi ya ƙaru, amma wannan dole ne a daidaita shi da ma'aunin damuwa $ K_t $ wanda aka gabatar da shi zuwa shaft, wanda aka lasafta kamar $ K_t = f (d, r_{groove}) $.